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-rw-r--r--src/emu/machine/6525tpi.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/emu/machine/6525tpi.c b/src/emu/machine/6525tpi.c
index 2d83a49527b..4589ff23ea7 100644
--- a/src/emu/machine/6525tpi.c
+++ b/src/emu/machine/6525tpi.c
@@ -535,6 +535,12 @@ WRITE8_MEMBER( tpi6525_device::write )
}
}
+void tpi6525_device::port_line_w(UINT8 &port, int line, int state)
+{
+ port &= ~(1 << line);
+ port |= state << line;
+}
+
/* this should probably be done better, needed for amigacd.c */
UINT8 tpi6525_device::get_ddr_a()